Serpentine rack



FIG. 1 is a perspective view of a serpentine rack showing my new design.

FIG. 2 is a top plan view thereof;

FIG. 3 is a left end elevational view thereof;

FIG. 4 is a right end elevational view thereof;

FIG. 5 is a right end elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken line showing of a base in the figures is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a serpentine rack, as shown and described. 